;; Copyright 2007-2011, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(declare (unit formdat))
(use regex)
(require-extension srfi-69)

(define formdat:*debug* #f)

;; Old data format was something like this. BUT! 
;; Forms do not have names so the hierarcy is
;; unnecessary (I think)
;;
;; hashtable
;;   |-formname --> <formdat> 'form-name=formname
;;   |                        'form-data=hashtable
;;   |                                       | name => value
;;
;; New data format is only the <formdat> portion from above

;; (define-class <formdat> ()
;;    (form-data
;;    ))
(define (make-formdat:formdat)(vector (make-hash-table)))
(define-inline (formdat:formdat-get-data   vec)    (vector-ref  vec 0))
(define-inline (formdat:formdat-set-data!  vec val)(vector-set! vec 0 val))

(define (formdat:initialize self)
  (formdat:formdat-set-data! self (make-hash-table)))

(define (formdat:get self key)

;; Copyright 2007-2011, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(declare (unit html-filter))
(require-extension regex)

;; 
(define (s:split-string strng delim)
  (if (eq? (string-length strng) 0) (list strng)
      (let loop ((head (make-string 1 (car (string->list strng))))
		 (tail (cdr (string->list strng)))
		 (dest '())

;; Copyright 2007-2010, Matthew Welland.
;;
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;;
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

;; twiki module
(require-extension sqlite3 regex posix md5 base64)
(import (prefix base64 base64:))

;; TODO
;;
;; * Inline tiddlers [inline[TiddlerName]]
;; * Pics            [pic X Y[picname.jpg]]
;; * Move twiki parsing/expanding to mattsutils as loadable module

;; This is the currently supported mechanism. Postgres will be added later -mrw- 7/26/2009
;;
(define (twiki:open-db key . create-not-ok)
  ;; (s:log "Got to twiki:open-db with key: " key)
  (let* ((create-ok (if (null? create-not-ok) #t (car create-not-ok)))
	 (fdat      (twiki:key->fname key))
	 (basepath  (sdat-get-twikidir s:session))
	 (fpath     (car fdat))
	 (fname     (cadr fdat))
	 (fullname  (conc basepath "/" fpath "/" fname))
	 (fexists   (file-exists? fullname))
	 (db        (if fexists (dbi:open 'sqlite3 (list (cons 'dbname fullname))) #f)))
    (if (and (not db)
	     (not create-ok))
	(exit 100)
	(begin
	  (if (not fexists)
	      (begin
		;; (print "fullname: " fullname)
		(twiki:register-wiki key fullname)
		(system (conc "mkdir -p " fpath)) ;; create the path
		(if (file-exists? fpath)
		    (s:log "OK: dir " fpath " has been made")
		    (s:log "ERROR: Failed to make the path for the twiki"))
		(set! db (dbi:open 'sqlite3 (list (cons 'dbname fullname))))
		(for-each 
		 (lambda (sqry)
		   ;; (print sqry)
		   (dbi:exec db sqry))
		 ;; types: 0 text, 1 jpg, 2 png, 3 svg, 4 spreadsheet, 5 audio, 6 video :: better specs to come...
		 (list

		  "CREATE TABLE members  (id INTEGER PRIMARY KEY,person_id INTEGER,group_id INTEGER);"
		  ;; setup and configuration data
		  "CREATE TABLE meta     (id INTEGER PRIMARY KEY,key TEXT,val TEXT);"
		  ;; need to create an entry for *this* twiki
		  (conc "INSERT INTO wikis (id,name,created_on) VALUES (1,'main'," (current-seconds) ");")))
		;;     (conc "INSERT INTO tiddlers (wiki_id,name,created_on) VALUES(1,'MainMenu'," (current-seconds) ");")))))
		(twiki:save-tiddler db "MainMenu" "[[FirstTiddler]]" "" 1 1)))
	  ;; (sqlite3:set-busy-timeout!(dbi:db-conn db) 1000000)
	  db))))

;;======================================================================
;; twikis (db naming, sqlite vs postgresql, keys etc.
;;======================================================================

;; A wiki is specified by a list of keys, here we convert that list to a single string

	 (p1         (substring keypath 0           delta)) ;;  0  8))
	 (p2         (substring keypath delta       (* delta 2)));;  8 16))
	 (p3         (substring keypath (* delta 2) (* delta 3)))) ;; 16 24))
    (list (string-intersperse (list "twikis" p1 p2 p3) "/") keypath)))

;; look up the wid based on the keys, this is used for sub wikis only. I.e. a wiki instantiated inside another wiki 
;; giving a separate namespace to all the tiddlers
(define (twiki:name->wid db name) 
  (let ((wid (dbi:get-one db "SELECT id FROM wikis WHERE name=?;" name)))
    (if wid wid
	(begin
	  (dbi:exec db "INSERT INTO wikis (name,created_on) VALUES(?,?);" name (current-seconds))
	  (twiki:name->wid db name)))))

;;======================================================================

;;======================================================================
;; twiki registry
;;======================================================================

;; these can be overridden by end user (just create a new routine by the same name)

(define (twiki:open-registry)
  (let* ((basepath  (sdat-get-sroot s:session))
	 (regfile   (conc basepath "/twikis/registry.db"))
	 (regexists (file-exists? regfile))
	 (db        (dbi:open 'sqlite3 (list (cons 'dbname regfile)))))
    (if regexists
	db
	(begin
	  (for-each (lambda (stmt)(dbi:exec db stmt))

	    (s:a "delete" 'href (s:link-to (twiki:get-link-back-to-current) 'delete_tiddler tnum))(s:br)
	    (s:input-preserve 'type "text" 'name "twiki_title" 'size "58" 'maxlength "150")
	    (s:textarea-preserve 'type "textarea" 'name "twiki_body" 'rows "10" 'cols "65")
	    (s:p "Tags" (s:input-preserve 'type "text" 'name "twiki_tags" 'size "55" 'maxlength "150")))))

;; save a tiddler to the db for the twiki twik, getting data from the INPUT
(define (twiki:save-curr-tiddler tdb wid)
  (formdat:printall (sdat-get-formdat s:session) s:log)
  (let* ((heading (s:get-input 'twiki_title))
	 (body    (s:get-input 'twiki_body))
	 (tags    (s:get-input 'twiki_tags))
	 (uid     (twiki:get-id)))
    ;; (s:log "twiki:save-curr-tiddler heading: " heading " body: " body " tags: " tags)
    (s:set! 'twiki_title heading)
    (if body

			"INSERT INTO tiddlers (wiki_id,name,dat_id,created_on,owner_id) VALUES(?,?,?,?,?);"
			wid heading dat-id (current-seconds) uid))
	  #t) ;; success
	#f))  ;; non-success

;; text=0, jpg=1, png=2
(define (twiki:save-dat db dat type)
  (let* ((md5sum (md5-digest dat))
	 (datid  (twiki:dat-exists? db md5sum type))
	 (datblob (if (string? dat)
		      (string->blob dat)
		      dat)))
    (if datid
	datid
	(begin

(define (twiki:get-thumb-dat tdb wid pic-id)
  (dbi:get-one tdb "SELECT dat FROM pics INNER JOIN dats ON pics.thumb_dat_id=dats.id WHERE pics.id=? AND wiki_id=?;" pic-id wid))

;; this one sets up the Content type, puts the data into page-dat and is done
(define (twiki:return-image-dat tdb wid pic-id)
  (let ((dat  (twiki:get-pic-dat tdb wid pic-id)))
    (s:log "twiki:return-image-dat dat is: " dat " of size: " (if (blob? dat)(blob-size dat) "[not a blob]"))
    (sdat-set-page-type!    s:session 'image)
    (sdat-set-content-type! s:session "image/jpeg")
    (sdat-set-alt-page-dat! s:session dat)))
    ;; (session:alt-out s:session)))

;; this one sets up the Content type, puts the data into page-dat and is done
(define (twiki:return-thumb-dat tdb wid pic-id)
  (let ((dat  (twiki:get-thumb-dat tdb wid pic-id)))
    (s:log "twiki:return-image-dat dat is: " dat " of size: " (if (blob? dat)(blob-size dat) "[not a blob]"))
    (sdat-set-page-type!    s:session 'image)
    (sdat-set-content-type! s:session "image/jpeg")
    (sdat-set-alt-page-dat! s:session dat)))
    ;; (session:alt-out s:session)))
  
(define (twiki:make-thumbnail tdb pic-id wid)
  (let ((indat  (twiki:get-pic-dat tdb wid pic-id)))
    ;;   (outdat (open-output-string)))
    (let-values (((inp oup pid)(process "convert" (list "-size" "500x180" "-" "-thumbnail" "250x90" "-unsharp" "0x.5" "-"))))
		(write-string (blob->string indat) #f oup)

    (dbi:close tdb)
    result))

;; should do a single more efficient query but this is good enough
(define (twiki:get-tiddlers db wid tnames)
  (apply twiki:get-tiddlers-by-name db wid tnames))
;;   (let* ((tdlrs '())
;; 	 ;; (conn   (sdat-get-conn s:session))
;; 	 (namelst (conc "('" (string-intersperse (map conc tnames) "','") "')"))
;; 	 (qry     (conc twiki:tiddler-selector " WHERE t.wiki_id=? AND t.id IN " namelst ";")))
;;     ;; (print qry)
;;     (dbi:for-each-row
;;      (lambda (row)
;;        (set! tdlrs (cons row tdlrs)))
;;      db qry wid)
;;     (reverse tdlrs))) ;; !Twiki\

;; tlst is a list of tiddler nums
(define (twiki:get-tiddlers-by-num db wid tlst)
  ;; (s:log "Got to twiki:get-tiddlers with keys: " tlst " and wid: " wid)
  ;; select where created_on < somedate order by created_on desc limit 1
  (let* ((tdlrs '())
	 (tlststr (string-intersperse (map number->string tlst) ","))
	 (already-got (make-hash-table))
	 (qry    (conc twiki:tiddler-selector " WHERE t.wiki_id=? AND t.id IN (" tlststr ") ORDER BY created_on DESC;")))


    (dbi:for-each-row
     (lambda (row)
       (let ((tname (twiki:tiddler-get-name row)))
	 (if (not (hash-table-ref/default already-got tname #f))
	     (begin
	       (set! tdlrs (cons row tdlrs))
	       (hash-table-set! already-got tname #t)))))

(define twiki:u          s:u)
(define twiki:td         s:td)
(define twiki:tr         s:tr)
(define twiki:table      s:table)
(define twiki:div        s:div)

(define (twiki:web64enc str)
  (string-substitute "=" "_" (base64:base64-encode str) #t))

(define (twiki:web64dec str)
  (base64:base64-decode (string-substitute "_" "=" str #t)))
    
(define (twiki:make-tlink text tiddlername)
  (s:a text 'href (s:link-to (twiki:get-link-back-to-current) 'view_tiddler (twiki:web64enc tiddlername))))

(define (twiki:pic pic-name size wiki)
  (let* ((tdb    (twiki:wiki-get-dbh wiki))
	 (tkey   (twiki:wiki-get-key wiki))

;; Copyright 2007-2011, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(declare (unit session))
(require-library dbi)
(require-extension regex)
(declare (uses cookie))

;; sessions table
;; id session_id session_key
;; create table sessions (id serial not null,session-key text);

;; session_vars table

  (let* ((rawconfigdat (session:read-config self))
	 (configdat (if rawconfigdat (eval rawconfigdat) '()))
	 (sroot     (s:find-param 'sroot    configdat))
	 (logfile   (s:find-param 'logfile  configdat))
	 (dbtype    (s:find-param 'dbtype   configdat))
	 (dbinit    (s:find-param 'dbinit   configdat))
	 (domain    (s:find-param 'domain   configdat))
	 (twikidir  (s:find-param 'twikidir configdat))
	 (page-dir  (s:find-param 'page-dir-style configdat)))
    (if sroot    (sdat-set-sroot!    self sroot))
    (if logfile  (sdat-set-logfile!  self logfile))
    (if dbtype   (sdat-set-dbtype!   self dbtype))
    (if dbinit   (sdat-set-dbinit!   self dbinit))
    (if domain   (sdat-set-domain!   self domain))
    (if twikidir (sdat-set-twikidir! self twikidir))
    (sdat-set-page-dir-style! self page-dir)
    ;; (print "configdat: ")(pp configdat)
    ;;(session:log self "sroot: " sroot " logfile: " logfile " dbtype: " dbtype 
    ;;		 " dbinit: " dbinit " domain: " domain " page-dir-style: " page-dir)
    )
  )
;;   (let ((dbtype (sdat-get-dbtype self)))

;; session vars
;; 1. keys are always a string NOT a symbol
;; 2. values are always a string conversion is the responsibility of the 
;;    consuming function (at least for now, I'd like to change this)

;; set a session var for the current page
;;
(define (session:curr-page-set! self key value)
  (hash-table-set! (sdat-get-pagevars self) (s:any->string key) (s:any->string value)))

;; del a var for the current page
;;
(define (session:page-var-del! self key)
  (hash-table-delete! (sdat-get-pagevars self) (s:any->string key)))

;; get the appropriate hash given a page "*sessionvars*, *globalvars* or page
;;
(define (session:get-page-hash self page)
  (if (string=? page "*sessionvars*")
      (sdat-get-sessionvars self)
      (if (string=? page "*globalvars*")
	  (sdat-get-globalvars self)
	  (sdat-get-pagevars self))))

;; set a session var for a given page
;;
(define (session:set! self page key value)
  (let ((ht (session:get-page-hash self page)))
    (hash-table-set! ht (s:any->string key) (s:any->string value))))

;; get session vars for the current page
;;
(define (session:page-get self key)
  (hash-table-ref/default (sdat-get-pagevars self) key #f))

;; get session vars for a specified page
;;
(define (session:get self page key)
  (let ((ht (session:get-page-hash self page)))
    (hash-table-ref/default ht key #f)))

    (session:get-param-from params key)))

;; This one will get the first value found regardless of form
(define (session:get-input self key)
  (let* ((formdat (sdat-get-formdat self)))
    (if (not formdat) #f
	(if (or (string? key)(number? key)(symbol? key))
	    (if (and (vector? formdat)(eq? (vector-length formdat) 1)(hash-table? (vector-ref formdat 0)))
		(formdat:get formdat key)
		(begin
		  (session:log self "ERROR: formdat: " formdat " is not of class <formdat>")
		  #f))
	    (session:log self "ERROR: bad key " key)))))

(define (session:run-actions self)

;; Copyright 2007-2011, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(declare (unit setup))
(declare (uses session))
(require-extension srfi-69)
(require-extension regex)

;; 
(define s:session (make-sdat))
(session:initialize s:session)

;; use this for getting data from page to page when scope and evals
;; get in the way

  (session:link-to s:session page params))

(define (s:get-param key)
  (session:get-param s:session key))

;; these are page local
(define (s:get key) 
  (session:page-get s:session key))

(define (s:set! key val)
  (session:curr-page-set! s:session key val))

(define (s:del! key)
  (session:page-var-del! s:session key))

(define (s:get-n-del! key)
  (let ((val (session:page-get s:session key)))
    (session:del! s:session key)
    val))

;; these are session wide
(define (s:session-var-get key) 
  (session:get s:session "*sessionvars*" key))

(define (s:session-var-set! key val)
  (session:set! s:session "*sessionvars*" key val))

(define (s:session-var-get-n-del! key)
  (let ((val (session:page-get s:session key)))
     (session:del! s:session "*sessionvars*" key)
     val))

(define (s:session-var-del! key)
  (session:del! s:session "*sessionvars*" key))

;;

(define (s:form   . args)
  ;; create a link for calling back into the current page and calling a specified 
  ;; function
  (let* ((action     (let ((v (s:find-param 'action args)))
                       (if v v "default")))
	 (id         (let ((i (s:find-param 'id args)))
		       (if i i #f)))
         (page       (let ((p (sdat-get-page s:session)))
                       (if p p "home")))
	 ;; (link       (session:link-to s:session page (if id
         ;;                                                 (list 'action action 'id id)
         ;;                                                 (list 'action action)))))
	 (link       (if (string=? (substring action 0 5) "http:") ;; if first part of string is http:
	        	 action
	        	 (session:link-to s:session 

;; (require-extension syntax-case)
;; (declare (run-time-macros))

(require-library dbi)

(include "requirements.scm")
(declare (uses cookie))
(declare (uses html-filter))
(declare (uses misc-stml))
(declare (uses formdat))
(declare (uses stml))
(declare (uses session))
(declare (uses setup)) ;; s:session gets created here
(declare (uses sqltbl))